SB2024012105 - Multiple vulnerabilities in GnuTLS

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Main Vulnerability Database SB2024012105

SB2024012105 - Multiple vulnerabilities in GnuTLS

Published: January 21, 2024

Security Bulletin ID SB2024012105
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Reachable Assertion (CVE-ID: CVE-2024-0567)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when verifying a certificate chain with a cycle of cross signatures. A remote attacker can pass a specially crafted certificate to the application and perform a denial of service (DoS) attack.


2) Information Exposure Through Timing Discrepancy (CVE-ID: CVE-2024-0553)

The vulnerability allows a remote attacker to perform timing attack.

The vulnerability exists due to the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding. A remote attacker can perform timing sidechannel attack in RSA-PSK key exchange.

Note, the vulnerability exists due to incomplete fox for #VU83316 (CVE-2023-5981).


Remediation

Install update from vendor's website.

References